Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4079
Number of amino acids:96
Molecular Weight:9563.24 Da
Theoretical pI:9.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1919.79%
Cysteine CYS (C)99.38%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)11.04%
Glycine GLY (G)1212.5%
Phynylalanine PHE (F)22.08%
Isoleucine ILE (I)22.08%
Histidine HIS (H)11.04%
Lysine LYS (K)22.08%
Methionine MET (M)33.13%
Leucine LEU (L)66.25%
Asparagine ASN (N)33.13%
Glutamine GLN (Q)44.17%
Proline PRO (P)44.17%
Serine SER (S)66.25%
Arginine ARG (R)77.29%
Threonine THR (T)33.13%
Tryptophan TRP (W)00%
Valine VAL (V)1010.42%
Tyrosine TYR (Y)22.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC403
HydrogenH668
NitrogenN128
OxygenO117
SulphurS12

FormulaC403H668N128O117S12
Total Number of Atoms:1328


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3480
Absorption 0.1% (=1 g/l)    0.364,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.312,   assuming all CYS residues are reduced
Aromaticity:0.042

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.36

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.92, 26.04, 29.17]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:82.5001
Grand average of hydropathicity (GRAVY):0.53